Heating and ventilation pipe connecting device of heating and ventilation equipment

Abstract

A heating and ventilation pipe connecting device of heating and ventilation equipment is arranged between two adjacent heating and ventilation pipes and comprises a first sealing gasket and an inner supporting cylinder inserted into the two adjacent heating and ventilation pipes, the outer circle face of the inner supporting cylinder is matched with the inner walls of the heating and ventilation pipes, the first sealing gasket is connected to the outer circle faces of the adjacent ends of the two heating and ventilation pipes in a sleeving mode, and the first sealing gasket is connected with the inner walls of the heating and ventilation pipes in a sleeving mode. The fastening connecting unit is connected with the heating and ventilation pipe in a fastening and sealing manner; a second sealing gasket is arranged between the adjacent end faces of the two heating and ventilation pipes, and the outer wall of the second sealing gasket is connected with the inner wall of the first sealing gasket. Every two adjacent heating and ventilation pipes are connected in an inserted mode through the corresponding inner supporting cylinder, the two ends of the corresponding inner supporting cylinder are inserted into the ends of the two corresponding heating and ventilation pipes respectively, the phenomenon that the heating and ventilation pipes are extruded to deform and crack when the first sealing gaskets are fastened to the heating and ventilation pipes through the fastening connecting units is avoided, the first sealing gaskets are arranged at the ends of the two corresponding heating and ventilation pipes in a sleeved mode, and therefore the heating and ventilation pipes are prevented from being damaged. The two heating and ventilation pipes are flexibly connected, and the leakage phenomenon between the two heating and ventilation pipes can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of heating and ventilation pipes, and specifically relates to a connecting device for heating and ventilation pipes of a heating and ventilation device. Background Technique

[0002] Heating and ventilation pipes refer to pipes used to convey fluid media in heating, ventilation, and air conditioning systems. During the laying of heating and ventilation pipes, it is necessary to connect the heating and ventilation pipes in sequence to form a heating and ventilation pipeline.

[0003] In the prior art, heating and ventilation pipes are generally connected through sleeves. A sleeve is sleeved outside two adjacent heating and ventilation pipes, and a sealing ring is provided between the sleeve and the heating and ventilation pipe. The sleeve is clamped on the heating and ventilation pipe through a clamp or other first connecting member to realize the connection of two heating and ventilation pipes. However, for heating and ventilation pipes made of plastic, because there is no support structure inside, the clamp is likely to squeeze and deform the heating and ventilation pipe when clamping the sleeve, causing cracks in the heating and ventilation pipe, affecting its use, and a single sealing ring alone cannot achieve a good sealing effect on the heating and ventilation pipe. Content of the Utility Model

[0004] To solve the technical problems existing in the above background technique, the utility model provides a connecting device for heating and ventilation pipes of a heating and ventilation device.

[0005] The technical solution of the utility model is as follows:

[0006] A connecting device for heating and ventilation pipes of a heating and ventilation device is arranged between two adjacent heating and ventilation pipes, and includes a first sealing gasket and an inner support cylinder inserted into the two adjacent heating and ventilation pipes. The outer cylindrical surface of the inner support cylinder is adapted to the inner wall of the heating and ventilation pipe. The first sealing gasket is sleeved on the outer cylindrical surface of the adjacent ends of the two heating and ventilation pipes and is tightly and hermetically connected to the heating and ventilation pipe through a fastening connection unit;

[0007] A second sealing gasket is arranged between the adjacent end faces of the two heating and ventilation pipes. The outer wall of the second sealing gasket is connected to the inner wall of the first sealing gasket, and the inner wall is closely attached to the outer cylindrical surface of the inner support cylinder.

[0008] The two heating and ventilation pipes are pre-connected through the inner support cylinder inserted therein. The first sealing gasket is sleeved on the outer cylindrical surface of the two heating and ventilation pipes to play a sealing role for the two heating and ventilation pipes. The second sealing gasket can seal the gap between the opposite end faces of the two heating and ventilation pipes, and cooperate with the first sealing gasket to achieve a multiple sealing effect; the inner support cylinder can support the inner walls of the two heating and ventilation pipes to prevent the heating and ventilation pipes from being squeezed and deformed when the fastening connection unit fastens the first sealing gasket, resulting in cracks.

[0009] Regarding the specific structure of the fastening connection unit, the fastening connection unit includes an outer connection cylinder and an inner connection cylinder sleeved outside the first sealing gasket, and the inner diameter of the inner connection cylinder can be changed with the movement of the outer connection cylinder. The first sealing gasket is located inside the inner connection cylinder. By adjusting the outer connection cylinder, the inner connection cylinder is extruded to tightly press the first sealing gasket against the outer circular surfaces of the two HVAC pipes, achieving a sealing effect.

[0010] Another connection method of the outer connection cylinder and the inner connection cylinder is that the outer connection cylinder and the inner connection cylinder are threadedly connected. The inner connection cylinder is made of elastic-plastic material, and the outer circular surface of the inner connection cylinder and the inner circular surface of the outer connection cylinder are tapered connection surfaces that match each other. By rotating the outer connection cylinder, the inner connection cylinder can be locked and deformed inward, and the deformed inner connection cylinder can exert an extrusion effect on the first sealing gasket, achieving the sealing effect between the first sealing gasket and the HVAC pipe.

[0011] To facilitate the installation of the inner connection cylinder on the first sealing gasket, the inner connection cylinder is provided with a split structure, including two inner arc-shaped cylinders arranged symmetrically, and the two inner arc-shaped cylinders are detachably connected.

[0012] Regarding the specific structure of the outer connection cylinder, the outer connection cylinder is provided with a split structure, including two outer arc-shaped cylinders arranged symmetrically, and the two outer arc-shaped cylinders are detachably connected. During the connection process of the two outer arc-shaped cylinders, the inner connection cylinder can be extruded to achieve the fastening of the first sealing gasket.

[0013] To facilitate the processing of the second sealing gasket and its better close contact with the end face of the adjacent HVAC pipe, both the side face of the second sealing gasket and the end face of the adjacent HVAC pipe are flat surfaces.

[0014] To facilitate the inner support cylinder to achieve a better support effect, the length of the inner support cylinder is set to be greater than the length of the first sealing gasket.

[0015] Regarding the connection structure of the two inner arc-shaped cylinders, both ends of the two inner arc-shaped cylinders are connected by a first connecting piece, and the first connecting piece located inside the outer connection cylinder is arranged on the end face of the arc-shaped cylinder without interfering with the outer connection cylinder and the first sealing gasket.

[0016] The beneficial effects of the present utility model are as follows:

[0017] The adjacent two HVAC pipes are first connected by inserting and connecting with the inner support cylinder. The two ends of the inner support cylinder are respectively inserted into the ends of the two HVAC pipes to support the two HVAC pipes and prevent the HVAC pipes from being extruded and deformed with cracks when the first sealing gasket is fastened to the HVAC pipes through the fastening connection unit. The first sealing gasket is sleeved on the ends of the two HVAC pipes, which not only plays a role of soft connection for the two HVAC pipes but also prevents leakage between the two HVAC pipes.

[0018] Moreover, the second gasket is connected to the end faces of the two HVAC pipes and is used to seal the gap between the opposite end faces of the two HVAC pipes. It is used in conjunction with the inner support cylinder to reduce the leakage of the medium inside the HVAC pipes from the ends.

[0019] Both the outer connection cylinder and the inner connection cylinder are split structures. By adjusting the outer connection cylinder, the inner connection cylinder is squeezed so that the first gasket tightly adheres to the outer circular surfaces of the two HVAC pipes, achieving a sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In the drawings:

[0021] Figure 1 is a schematic structural diagram;

[0022] Figure 2 is a top view;

[0023] Figure 3 is Figure 2 a schematic cross-sectional structural diagram taken along the A-A direction of

[0024] Figure 4 is Figure 3 an enlarged structural diagram at position A in

[0025] Figure 5 is a schematic structural diagram of the outer connection cylinder;

[0026] Figure 6 is a schematic structural diagram of the inner connection cylinder;

[0027] Figure 7 is Figure 6 an enlarged structural diagram at position B in

[0028] The components represented by the reference numerals in the drawings are:

[0029] 1, the first HVAC pipe; 2, the second HVAC pipe; 3, the inner support cylinder; 4, the first gasket; 5, the second gasket; 6, the outer connection cylinder; 61, the outer arc cylinder; 62, the connection table; 63, the fastening bolt; 7, the inner connection cylinder; 71, the inner arc cylinder; 72, the first connection bolt; 73, the connection plate; 74, the second connection bolt. DETAILED DESCRIPTION OF THE INVENTION

[0030] Refer to Figure 1 、 Figure 2 and Figure 3A connecting device for HVAC pipes of an HVAC device as shown, which is arranged between two adjacent HVAC pipes. The two HVAC pipes are the first HVAC pipe 1 and the second HVAC pipe 2. The connecting device for HVAC pipes includes a first gasket 4 and an inner support cylinder 3 inserted into the two adjacent HVAC pipes. The outer circular surface of the inner support cylinder 3 is adapted to the inner wall of the HVAC pipe. The first gasket 4 is sleeved on the outer circular surface of the adjacent ends of the two HVAC pipes and is tightly and sealedly connected to the HVAC pipe through a fastening connection unit. To facilitate the inner support cylinder 3 to achieve a better support effect, the length of the inner support cylinder 3 is set to be greater than the length of the first gasket 4.

[0031] The first HVAC pipe 1 and the second HVAC pipe 2 are first connected by inserting and connecting through the inner support cylinder 3. The two ends of the inner support cylinder 3 are respectively inserted into the ends of the adjacent sides of the first HVAC pipe 1 and the second HVAC pipe 2, which is used to support the first HVAC pipe 1 and the second HVAC pipe 2, and avoid the phenomenon that the HVAC pipe is extruded and deformed when the fastening connection unit fastens the first gasket 4, resulting in cracks. The first gasket 4 is sleeved on the outer circular surfaces of the two HVAC pipes, which plays a sealing role for the two HVAC pipes.

[0032] See Figure 3 and Figure 4 As shown, a second gasket 5 is provided between the adjacent end faces of the first HVAC pipe 1 and the second HVAC pipe 2. The outer wall of the second gasket 5 is connected to the inner wall of the first gasket 4, and the inner wall is closely attached to the outer circular surface of the inner support cylinder 3. The second gasket 5 and the first gasket 4 are of an integrally formed structure, and the cross-section is in a T-shaped shape. The second gasket 5 is connected to the end faces of the two HVAC pipes, which is used to seal the gap between the opposite end faces of the two HVAC pipes. It is used in cooperation with the inner support cylinder 3 to reduce the phenomenon of the medium in the HVAC pipe leaking from the end, and can also cooperate with the first gasket 4 to achieve a multiple sealing effect.

[0033] The specific structure of the above-mentioned second gasket 5 is that the side surface of the second gasket 5 is closely attached to the end face of the adjacent HVAC pipe, which improves the sealing effect in cooperation with the first gasket 4.

[0034] See Figure 3 As shown, regarding the specific structure of the fastening connection unit, the fastening connection unit includes an outer connection cylinder 6 and an inner connection cylinder 7 that are locked and connected. The outer connection cylinder 6 is sleeved on the outer circular surface of one of the HVAC pipes, and the inner connection cylinder 7 is sleeved on the outer circular surface of the other HVAC pipe. The first gasket 4 is located inside the inner connection cylinder 7. By adjusting the outer connection cylinder 6, the inner connection cylinder 7 is squeezed to closely attach to the outer circular surfaces of the two HVAC pipes, achieving a sealing effect.

[0035] See Figure 4 and Figure 6As shown in the figure, if the inner connecting cylinder 7 is an integral structure, it needs to be inserted outside the first gasket 4. However, the material of the first gasket 4 is rubber with friction, making it inconvenient to directly sleeved the inner connecting cylinder 7 outside the first gasket 4. To facilitate the installation of the inner connecting cylinder 7 on the first gasket 4 and be able to extrude the first gasket 4, the inner connecting cylinder 7 is set as a split structure, including two inner arc-shaped cylinders 71 arranged symmetrically. The two inner arc-shaped cylinders 71 are detachably connected. Among them, both ends of the two inner arc-shaped cylinders 71 are connected by the first connecting members. Each end of the inner arc-shaped cylinder 71 is provided with two groups of first connecting members for connecting and fixing the two inner arc-shaped cylinders 71. The outer connecting cylinder 6 is sleeved outside the inner connecting cylinder 7 and is locked and connected with it. Therefore, the two first connecting members at one end of the inner connecting cylinder 7 will inevitably be located inside the outer connecting cylinder 6. The two first connecting members inside the outer connecting cylinder 6 are arranged on the end face of the arc-shaped cylinder and do not interfere with the outer connecting cylinder 6 and the first gasket 4. The first connecting member includes two first connecting bolts 72 and a connecting plate 73. Both ends of the connecting plate 73 are located at the joint of the two inner arc-shaped cylinders 71. The two first connecting bolts 72 respectively pass through the connecting plate 73 and are threadedly connected to the corresponding inner arc-shaped cylinder 71. The first connecting bolts 72 are arranged on the end face of the inner arc-shaped cylinder 71, and the axis of the first connecting bolt 72 is parallel to the axis of the inner arc-shaped cylinder 71. The width of the first connecting bolt 72 is less than the thickness of the inner arc-shaped cylinder 71, and the setting position of the first connecting bolt 72 will not interfere with the outer connecting cylinder 6 and the first gasket 4. The first connecting member located outside the outer connecting cylinder 6 includes a second connecting bolt 74, and the two inner arc-shaped cylinders 71 are connected and fixed by the second connecting bolt 74.

[0036] See Figure 5 As shown in the figure, regarding the specific structure of the outer connecting cylinder 6, the outer connecting cylinder 6 is a split structure, including two outer arc-shaped cylinders 61 arranged symmetrically. The two outer arc-shaped cylinders 61 are detachably connected. During the connection process of the two outer arc-shaped cylinders 61, the inner connecting cylinder 7 can be extruded to realize the fastening of the first gasket 4. The two outer arc-shaped cylinders 61 are connected and fixed by four groups of fastening bolts 63. A connecting platform 62 can be set at the same end of the two outer arc-shaped cylinders 61, and the two symmetrically arranged connecting platforms 62 are connected by the fastening bolts 63 to realize the connection and fixation of the two outer arc-shaped cylinders 61. The other ends of the two outer arc-shaped cylinders 61 can be directly connected by the fastening bolts 63. The connection method is the prior art, ensuring the fixed connection of both ends of the two outer arc-shaped cylinders 61 and being convenient for disassembly. One connection method between the outer connecting cylinder 6 and the inner connecting cylinder 7 is that during the process of connecting the two outer arc-shaped cylinders 61 by the fastening bolts, the two outer arc-shaped cylinders 61 can be tightened to clamp the inner connecting cylinder 7 inward, and then the first gasket 4 can be extruded and pressed tightly against the outer circular surface of the HVAC pipe through the inner connecting cylinder 7 to realize sealing.

[0037] There can also be another connection method between the outer connection cylinder 6 and the inner connection cylinder 7. The outer connection cylinder 6 and the inner connection cylinder 7 are threadedly connected. The inner connection cylinder 7 is made of elastic-plastic material. The outer cylindrical surface of the inner connection cylinder 7 and the inner cylindrical surface of the outer connection cylinder 6 are both tapered connection surfaces that are adapted to each other. Moreover, the inner diameter of the inner connection cylinder 7 can change with the movement of the outer connection cylinder 6. By rotating the outer connection cylinder 6, the inner connection cylinder 7 can be locked and deformed inward. The deformed inner connection cylinder 7 can exert an extrusion effect on the first gasket 4, achieving the sealing effect between the first gasket 4 and the HVAC pipe.

Claims

1. A HVAC pipe connection device for HVAC equipment, arranged between two adjacent HVAC pipes, characterized in that: It comprises a first sealing gasket (4) and an inner support tube (3) inserted into two adjacent HVAC pipes, the outer circumferential surface of the inner support tube (3) being adapted to the inner wall of the HVAC pipe, the first sealing gasket (4) being sleeved on the outer circumferential surfaces of the adjacent ends of the two HVAC pipes and being fastened and sealed to the HVAC pipes via a fastening connection unit; A second sealing gasket (5) is provided between the adjacent end surfaces of the two HVAC pipes. The outer wall of the second sealing gasket (5) is connected to the inner wall of the first sealing gasket (4), and the inner wall is in close contact with the outer circumferential surface of the inner support tube (3).

2. A HVAC pipe connection device for HVAC equipment according to claim 1, characterized in that: The fastening connection unit comprises an outer connection tube (6) and an inner connection tube (7) which are sleeved on the outside of the first sealing gasket, and the inner diameter of the inner connection tube can be changed with the movement of the outer connection tube.

3. A HVAC pipe connection device for HVAC equipment according to claim 2, characterized in that: The outer connecting tube (6) and the inner connecting tube (7) are threadedly connected, the inner connecting tube (7) is made of elastic plastic material, and the outer circular surface of the inner connecting tube (7) and the inner circular surface of the outer connecting tube (6) are matching conical connecting surfaces.

4. A HVAC pipe connection device for HVAC equipment according to claim 2, characterized in that: The inner connecting cylinder (7) is a split structure, comprising two symmetrically arranged inner arc-shaped cylinders (71), and the two inner arc-shaped cylinders (71) are detachably connected.

5. The HVAC pipe connection device of HVAC equipment according to claim 2, characterized in that: The outer connecting cylinder (6) is a split structure, comprising two symmetrically arranged outer arc-shaped cylinders (61), and the two outer arc-shaped cylinders (61) are detachably connected.

6. The HVAC pipe connection device of HVAC equipment according to claim 1, characterized in that: The side surfaces of the second sealing gasket (5) and the end surfaces of the adjacent HVAC pipes are both planes.

7. A HVAC pipe connection device for HVAC equipment according to claim 1, characterized in that: The length of the inner support tube (3) is greater than the length of the first sealing gasket (4).

8. The HVAC pipe connection device of HVAC equipment according to claim 4, characterized in that: Both ends of the two inner arc-shaped cylinders (71) are connected by a first connecting piece, and the first connecting piece located inside the outer connecting cylinder (6) is arranged on the end surface of the arc-shaped cylinder and does not interfere with the outer connecting cylinder (6) and the first sealing gasket (4).

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